Is this normal??

Sara • First time mommy to be💕🍼

I have been spotting and on a light period for over a month. I get small blood cloths. Sometimes my spotting is too heavy for a tin pad and when I use a tampon barely anything is on it. When I whipe it's pink and sometimes dark pink. I also get really bad cramps sometimes... I have unprotected sex each time. I had a depo provera shot on August 22 2017.. I feel light headed and sick as a dog. I even get bad headaches. Help me